Unit Plan
Khan Academy

Khan Academy: Add and Subtract Fractions Challenge

For Students 4th - 6th Standards
Challenge problems involving adding and subtracting fractions that have unlike denominators. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Unit Plan
Khan Academy

Khan Academy: Visually Add and Subtract Fractions

For Students 4th - 6th Standards
Practice adding and subtracting fractions that have different denominators. Problems have fraction diagrams. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Activity
Lawrence Hall of Science

The Math Page: Skill in Algebra: Adding Algebraic Fractions

For Students 9th - 10th
Here is a site that clearly and thoroughly explains adding algebraic fractions (rational expressions) both with common denominators and with different denominators. There are example problems solved, problems for the student to attempt,...
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McGraw Hill

Glencoe: Self Check Quizzes 1 Adding and Subtracting Mixed Numbers

For Students 3rd - 8th
Use Glencoe's randomly generated self-checking quiz to test your knowledge of adding and subtracting mixed numbers. Each question has a "Hint" link to help. Choose the correct answer for each problem. At the bottom of the page click the...
Website
Varsity Tutors

Varsity Tutors: Hotmath: Algebra Review: Add and Subtract Fractions

For Students 9th - 10th Standards
Find a quick, concise explanation of how to add and subtract fractions. Step by step examples are included to help you understand how to find the sum or difference for fractions with both like and unlike denominators.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: Egyptian Fractions

For Teachers 5th - 8th Standards
One goal of this task is to help students develop comfort and ease with adding fractions with unlike denominators. Another goal is to help them develop fraction number sense by having students decompose fractions. Aligns with 5.NF.A.1.
Unit Plan
E-learning for Kids

E Learning for Kids: Math: Husky Sled: Fractions and Decimals

For Students 5th - 6th Standards
In this interactive website students practice various skills including adding fractions with common denominators, adding fractions with different denominators, adding decimals, finding equivalent fractions, and calculating averages.
Handout
Homeschool Math

Homeschool Math: Adding and Subtracting Unlike Fractions

For Students 5th Standards
This fifth-grade lesson teaches how to add and subtract unlike fractions using a video presentation and visual models. [7:19] Includes practice exercises.
Activity
Texas Instruments

Texas Instruments: Rational Addition, Subtraction

For Teachers 9th - 10th
This StudyCard stack covers adding (or subtracting) numerators with simple to complex denominators. The set ends with sums or differences of rational functions with different denominators.
Activity
Teaching Treasures Publications

Teaching Treasures: Year Five Math (Page 5)

For Students 3rd - 8th Standards
Sharpen your computation skills with this interactive worksheet. The focus is adding and subtracting fractions with like and unlike denominators and reducing to lowest terms. Problems are set up horizontally and answers can be checked...
Unit Plan
Math Is Fun

Math Is Fun: Addition of Fractions

For Students 3rd - 5th Standards
This very basic website gives simple, easy steps on how to add fractions with the same denominator and what to do when they have different denominators.
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Common Core Sheets

Common Core Sheets: Number and Operations Fractions 5.nf.2 Worksheets

For Teachers 5th
Worksheets provide practice with solving adding and subtracting fractions with answer keys are provided. You can even create your own worksheet or flash cards.
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Khan Academy

Khan Academy: Add and Subtract Fractions Challenge

For Students 5th
Challenge problems involving adding and subtracting fractions that have unlike denominators.
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Khan Academy

Khan Academy: Add and Subtract Fractions Word Problems

For Students 5th
Practice solving fraction addition and subtraction word problems. The fractions in these problems have unlike denominators.
Unit Plan
PBS

Pbs: The Lowdown: A Rhythm Etic

For Students 6th - 8th
Rock out to a musical demonstration of math involved in constructing rhythms from groups of beats in this video from KQED. In the accompanying classroom activity, students consider how the note durations comprising a measure in 3/4 time...
Unit Plan
CK-12 Foundation

Ck 12: Algebra: Sums and Differences of Single Variable Expressions

For Students 6th Standards
[Free Registration/Login may be required to access all resource tools.] Simplify single variable expressions involving addition and subtraction by combining like terms.